Latest news with #Chandrayaan-2
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First Post
2 days ago
- Science
- First Post
How does Isro save satellites from collision?
The Indian Space Research Organisation (Isro) saved its satellites from collision 11 times in 2024 by performing collision avoidance manoeuvres. read more India saved its satellites from collision 11 times in 2024, according to Isro's Indian Space Situational Assessment Report (ISSAR) report. The Indian Space Research Organisation (Isro) in the report said that it saved six satellites in the low-Earth orbit (LEO) and four in the geostationary orbit (GEO) from collision. The Isro also said that it prevented the Chandrayaan-2 orbiter from a planetary collision. The Isro said that an orbit maintenance manoeuvre was originally scheduled for Chandrayaan-2 on November 26, 2024, but it was advanced to Nov. 11 to mitigate conjunctions with Nasa's Lunar Reconnaissance Orbiter (LRO), which were predicted to occur on Nov. 15-16. STORY CONTINUES BELOW THIS AD The Isro prevents such collisions by performing collision avoidance manoeuvres (CAM). These are planned changes in a spacecraft or a satellite's trajectory in space to avoid running into some other space object, which can be a body in the space, satellites, or debris from other satellites. The Isro performs such manoeuvres after conducting Space Situational Awareness (SSA) assessments to see whether an object in the space is going to be in the close vicinity of a spacecraft or a satellite. Such objects can include space debris, natural objects like asteroids and meteoroids, and energy and particle flux. ALSO READ: From a slow start to a concrete policy, how India has shaped space research with hits and misses Isro's System for Safe and Sustainable Operations Management (IS4OM) functions as the nodal entity for all space sustainability efforts, including SSA assessments and to improve compliance with internationally-recognised guidelines on the long-term sustainability of outer space activities. Isro in the report said that it conducts analyses to predict close approaches by other space objects to Indian space assets. In case of any critical close approach, CAMs are carried out to rule out or minimise the collision risk. Last year, the Isro said that the Combatant Space Operations Center of the US Space Command had issued more than 53,000 alerts Isro's Earth-orbiting satellites. These alerts were analysed using more accurate orbital data from flight dynamics and 11 collision avoidance manoeuvres were conducted — as mentioned above. STORY CONTINUES BELOW THIS AD The Isro released the following graph to show the CAMs conducted in recent years: Cumulative number of collision avoidance manoeuvres (CAMs) performed for Earth-orbiting satellites of Isro till 2024. (Photo: Isro) The number of CAMs was less in 2024 compared to the previous year because improved close approach analysis methodology with larger conjunction screening volume and usage of more accurate ephemerides helped to meet collision avoidance requirements by adjusting orbit maintenance manoeuvres on several occasions and avoiding exclusive CAMs, according to Isro. Last year, the Isro said, all manoeuvre plans, including those of the CAMs, were subjected to close approach risk analysis to rule out any potential close approach with other neighbouring space objects imminently after the manoeuvres. In doing so, the report said that 89 manoeuvre plans were revised to avoid post-manoeuvre close approaches with other space objects for LEO satellites and on two occasions manoeuvre plans were revised such for GEO satellites.
Time of India
3 days ago
- Science
- Time of India
ISRO averts 10 collisions in space, backs requirement of Space Traffic Management system
The Indian Space Research Organisation (ISRO) in 2024 successfully averted 10 potential collisions involving its satellites. As per the Indian Space Situational Assessment Report (ISSAR) released by the space agency, collision avoidance manoeuvres (CAM) were carried out to avoid damages. The space agency also flagged the increase in space activity across the globe and highlighted the need for an active Space Traffic Management (STM) system. 'The sheer number of close approach alerts indicates the alarmingly rising congestion in space, especially low-Earth orbit,' ISRO said in its report, adding that with the easier access to space through rideshare, coupled with technological advancements, the future space traffic is not likely to show any signs of slowing down. The agency added that spaceflight safety in the future is expected to involve more intensive coordination and cooperation between various spacefaring entities. 'It is desirable that a suitable collaborative framework evolves for meeting STM requirements,' ISRO said. The space agency received more than 53000 alerts by the Combined Space Operations Center (CSpOC), the US–led multinational space operations center for its satellites, which were analysed using data from flight dynamics resulting in 10 anomalies. ISRO carried out six critical manoeuvres in LEO and four in GEO. For Chandrayaan-2 an orbit maintenance manoeuvre was also conducted to mitigate conjunctions with Lunar Reconnaissance Orbiter, a NASA mission launched in 2009. Currently, India has 22 satellites in LEO (Low Earth Orbit) and 31 in GEO (Geo-synchronous Earth Orbit), which are important to protect. In 2024 India undertook five launches from Sriharikota and all of them were successfully placed in their intended orbits. ISRO said the number of CAMs was lesser in 2024 compared to the previous year. 'This is because improved close approach analysis methodology with larger conjunction screening volume and usage of more accurate ephemerides helped to meet collision avoidance requirements by adjusting orbit maintenance manoeuvres on several occasions and avoiding exclusive CAMs.' The space agency said post the corrections, 89 manoeuvre plans were revised to avoid post-manoeuvre close approaches with other space objects for LEO satellites.
Time of India
3 days ago
- Science
- Time of India
ISRO averts 10 collisions in space, backs requirement of Space Traffic Management system
The Indian Space Research Organisation ( ISRO ) in 2024 successfully averted 10 potential collisions involving its satellites. As per the Indian Space Situational Assessment Report (ISSAR) released by the space agency, collision avoidance manoeuvres (CAM) were carried out to avoid damages. The space agency also flagged the increase in space activity across the globe and highlighted the need for an active Space Traffic Management (STM) system. 'The sheer number of close approach alerts indicates the alarmingly rising congestion in space, especially low-Earth orbit,' ISRO said in its report, adding that with the easier access to space through rideshare, coupled with technological advancements, the future space traffic is not likely to show any signs of slowing down. The agency added that spaceflight safety in the future is expected to involve more intensive coordination and cooperation between various spacefaring entities. 'It is desirable that a suitable collaborative framework evolves for meeting STM requirements,' ISRO said. by Taboola by Taboola Sponsored Links Sponsored Links Promoted Links Promoted Links You May Like Here's The Estimated Cost of a 1-day Gutter Guards Installation HomeBuddy Undo The space agency received more than 53000 alerts by the Combined Space Operations Center (CSpOC), the US–led multinational space operations center for its satellites, which were analysed using data from flight dynamics resulting in 10 anomalies. ISRO carried out six critical manoeuvres in LEO and four in GEO. For Chandrayaan-2 an orbit maintenance manoeuvre was also conducted to mitigate conjunctions with Lunar Reconnaissance Orbiter, a NASA mission launched in 2009. Live Events Currently, India has 22 satellites in LEO (Low Earth Orbit) and 31 in GEO (Geo-synchronous Earth Orbit), which are important to protect. In 2024 India undertook five launches from Sriharikota and all of them were successfully placed in their intended orbits. Discover the stories of your interest Blockchain 5 Stories Cyber-safety 7 Stories Fintech 9 Stories E-comm 9 Stories ML 8 Stories Edtech 6 Stories ISRO said the number of CAMs was lesser in 2024 compared to the previous year. 'This is because improved close approach analysis methodology with larger conjunction screening volume and usage of more accurate ephemerides helped to meet collision avoidance requirements by adjusting orbit maintenance manoeuvres on several occasions and avoiding exclusive CAMs.' The space agency said post the corrections, 89 manoeuvre plans were revised to avoid post-manoeuvre close approaches with other space objects for LEO satellites.
Daily News Egypt
11-03-2025
- Science
- Daily News Egypt
Indian mission reveals surprising plasma behaviour in Moon's ionosphere
India's Chandrayaan-2 mission has revealed the Earth's geomagnetic tail has a significant impact on the Moon's ionosphere, challenging prior assumptions about plasma behaviour in the lunar environment. The findings were reported by Trinity Mirror, a partner of TV BRICS. The mission uncovered unexpectedly high electron densities in the Moon's ionosphere when it passes through the Earth's geomagnetic tail. The study suggests that lunar crustal magnetic fields may play a greater role in shaping plasma dynamics than previously understood. Researchers used an innovative two-way radio occultation experiment, analysing S-band telemetry and telecommand signals transmitted by the Chandrayaan-2 orbiter. The signals revealed electron densities reaching approximately 23,000 electrons per cubic centimetre, nearly 100 times higher than those observed on the Moon's sunlit side. The new findings suggest remnant lunar crustal magnetic fields could be trapping plasma, preventing its dissipation, and leading to localised electron density enhancements. These insights are crucial for future robotic and crewed missions to the Moon, as high plasma densities can affect radio communications, surface charging, and lunar dust interactions.
See - Sada Elbalad
11-03-2025
- Science
- See - Sada Elbalad
India Discovers Remarkable Plasma Behaviour in Moon's Ionosphere
Yara Sameh The Indian Chandrayaan-2 mission has uncovered significant effects of Earth's geomagnetic tail on the Moon's ionosphere, challenging previous assumptions about plasma behaviour in the lunar environment, the international media partner of the event, and a partner of Sada El-Balad, reported. A study found unexpectedly high electron densities in the Moon's ionosphere when it enters Earth's geomagnetic tail. This suggests that lunar crustal magnetic fields may play a far greater role in shaping plasma dynamics than previously understood. Using an innovative two-way radio occultation experiment, researchers analysed S-band telemetry and telecommand signals transmitted by the Chandrayaan-2 orbiter. These signals revealed electron densities reaching approximately 23,000 electrons per cubic centimetre, nearly 100 times higher than those observed on the Moon's sunlit side. New findings suggest that remnant lunar crustal magnetic fields could be trapping plasma, preventing its dissipation, and leading to localised electron density enhancements. These insights are crucial for upcoming robotic and crewed missions, as high plasma densities can impact radio communications, surface charging, and lunar dust interactions.
